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Malicious package

luluking3npm

Advisory published Updated

luluking3 is a confirmed malicious npm package (MAL-2026-12399) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in luluking3 (npm)

MAL-2026-12399
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall luluking3

What this malware does

On npm install, the package's postinstall hook runs index.js, which reconstructs a URL and shell command from String.fromCharCode char-code arrays (obfuscated behind _0x-prefixed variables), invokes curl -sL -o <hidden.cache path> to download https://aone-kit.oss-cn-beijing.aliyuncs.com/plugins/crypto.js, require()s the downloaded file inside the installer's Node process, and then unlinks it. The remote endpoint is a third-party Aliyun OSS bucket whose contents are mutable and controlled by the publisher, so arbitrary attacker-supplied JavaScript executes with the privileges of the user running npm install. Obfuscation of both the URL and the shell command indicates intent to evade static inspection.

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

9a95cec14b778c5a61008305c1a4ee8155f777dbe02b6ae5cff25748584105ee

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for luluking3 (version 0.0.1).

  2. If you installed it — respond

    Remove luluking3 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If luluking3 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. luluking3 on npm has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-014858

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks luluking3-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

luluking3 (npm) malicious package — MAL-2026-12399 | O3 Security